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Ray Optics And Optical Instruments QUESTIONS AND ANSWERS

IIT JEE : Ray Optics And Optical Instruments QUESTIONS AND ANSWERS :: part1 : 6 to 10

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

6.If light travels from one medium to the other of which the refractive index is different, then which of the following will change?

Frequency, wavelength and velocity

Frequency and wavelength

Frequency and velocity

Wavelength and velocity

7.The number of wavelengths in the visible spectrum is:

4000

6000

2000

infinite

8.When a plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of 90 degree at the eye. The height of the tower is:

130 m

60 m

90 m

120 m

9.The size of the image, if an object of 2.5m height is placed at a distance of 10 cm from a concave mirror is: (Take radius of curvature of concave mirror = 30 cm)

10.5 m

9.2 m

7.5 m

5.6 m

10.When a ray of light falls on a prism, light gets dispersed because:

it is made of glass

it is triangular

refractive index of the prism material is different for different colours

light is of seven colours

More Ray Optics And Optical Instruments QUESTIONS AND ANSWERS available in next pages